In the piece, the argument of string theory critics is given as: ...

A few weeks ago I recorded a podcast with Robinson Erhardt, which has now appeared as String Theory and the Crisis in Physics. We mainly talk about the current situation of string theory in physics ...

Schedule: The class meets once weekly. Topics and readings for each session are listed below. This course is being taught by two senior faculty members who are theorists and practitioners in ...

The Columbia Algebraic Geometry Seminar takes place on Fridays at 3:30 pm in 417 Mathematics Hall on the Columbia campus. All are welcome. Tea is served at 3 pm in 508 Mathematics Hall. The seminar is ...

I recently did another podcast with Curt Jaimungal, on the topic of unification, which is now available here. As part of this I prepared some slides, which are available here. The main goal of the ...

The Columbia Algebraic Geometry Seminar takes place on Fridays at 3:30 pm in 407 Mathematics Hall on the Columbia campus. The seminar is organized by Giulia Saccà, James Hotchkiss, and Yoon-Joo Kim.

We meet on Mondays from 2:40pm to 4pm in room 528 to go over lecture notes in Hyperbolic PDEs and General Relativity and present recent interesting preprints.

The Columbia Algebraic Geometry Seminar this semester is online. Because of this, it also has a temporary alternate schedule. It takes place every other Friday at 1:00 pm on Zoom (password is the ...

Ted Jacobson has put on the arXiv a transcription of a 1947 Feynman letter about his efforts to better understand the Dirac equation, in order to find a path integral formulation of it. The letter ...